APA Style

Azar, B, S, 1., Hagen, S, A, 1. (2017). Understanding and using English grammar with essential online resources / Betty S. Azar, Stacy A. Hagen (5). Hoboken, N.J: Pearson Education..

MLA Style

Azar, Betty, Schrampfer,, 1941-., Hagen, Stacy, A.,, 1956-. "Understanding and using English grammar with essential online resources / Betty S. Azar, Stacy A. Hagen". 5 Hoboken, N.J: Pearson Education., 2017. หนังสือ (Book).